Unreviewed test gardening for High Sierra.
* platform/mac-sierra/http/tests/blink/sendbeacon/beacon-same-origin-expected.txt: Added.
* platform/mac-sierra/imported/w3c/web-platform-tests/beacon/headers/header-content-type-expected.txt: Renamed from LayoutTests/platform/mac-wk2/imported/w3c/web-platform-tests/beacon/headers/header-content-type-expected.txt.
* platform/mac/http/tests/blink/sendbeacon/beacon-same-origin-expected.txt: Added.
* platform/mac/imported/w3c/web-platform-tests/beacon/headers/header-content-type-expected.txt: Added.
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@224848
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